I have been on warfarin for about 4 months. I have had a relatively stable INR level (1.9 to 2.7) for most of that time. Lately it has been dropping - 1.5 last reading. I have been working out more, and I've consumed more alcohol than during the first 3 months. I've also been eating healthier - more veggies, less junk food etc. I've also lost about 10 pounds.